While not as entertaining as CowTipping, BlogRolling is quiet the worthwhile endeavor. It helps with acquiring new readers and also letting your current readers know of other blogs that you find fascinating or, at least, mildly enjoyable. There is, however, one drawback. Once linked, you become, in a sense, friends and your previously favorite activity of posting rude and disparaging comments is now very much frowned upon.
There's one aspect of blogrolling which I find extremely confusing. I have noticed, on several occasions, bloggers either asking if it was acceptable that they blogrolled someone or if they may do so. Would a blogger really reply that no, it's not acceptable and that he/she doesn't want any of the other blogger's readers happening upon his blog. Total absurdity.